The contest to find Britain's best amateur sewer returns with 10 competitors trying to impress judges May Martin from the Women's Institute and Savile Row designer Patrick Grant. In the first episode, they are asked to work with cotton - a core fabric in every dressmaker's cupboard. First up they have to make a pair of women's trousers with a complicated invisible zip, then transform a denim shirt in just 90 minutes before producing a stunning summer dress for their real-life models. Claudia Winkleman presents.